BOINC requires use of a password to access it’s RPC interface. You can
find this password in the gui_rpc_auth.cfg file in your BOINC directory.

By default, the module will try to auto-detect the password by looking
in /var/lib/boinc for this file (this is the location most Linux
distributions use for a system-wide BOINC installation), so things may
just work without needing configuration for the local system.